Lug strap



w. l. BULLARD 2,024,757

LUG STRAP Filed Aug. 16, 1954 2 Sheets-Sheet l Dee; 17, 1935.

Je d' DeC. 17, 1935. W L BULLARD v 2,024,757

LUG STRAP v Filed Aug. 16, 1954 2 Sheets-Sheet 2 Patented Dec. 17, 1935PATENT OFFICE LUG STRAP Washington Irving Bullard, Danielson, Conn., as-

signor to E. H. Jacobs Manufacturing Co.,

Danielson, Conn.

Application August 16, 1934, Serial No. 740,062

1 Claim.

My present invention is a novel and improved lug strap', preferably ofthe reinforced type, and comprises a novel method of making same.

In my prior Patent No. 1,775,077, issued September 2, 1930, and my priorand copending application 650,668, filed January 7, 1933, I havedisclosed and claimed various methods of making reinforced lug straps oftextile material and, preferably, showing a smooth taperedreinforcement.

My present invention is an improvement on the devices of these priorinventions and consists in making a double reinforcement, particularlyat the heel or crown of the lug strap, both reinforcinginstrumentalities including means to continue or insure a smooth taperedstructure of both reinforcements and the two arms of the strap.

In carrying out the method of manufacturing my present improved lugstrap, I prefer to utilize one or more of the methods of reinforcementof the main portion of the lug strap structure as shown in my said priorapplication 650,668, wherein a reinforcing layer, or layers, isincorporated in the interrolling of the fabric constituting the lugstrap, with an angular portion positioned practically midway of thesheet of material which is to be interrolled, with suitable adhesive, toform the lug strap structure, thus giving greater thickness in taperedcontour at the crown where the Wear is greatest. In addition, I alsotaper, suitably and proportionally, the extra leather facing which isalso a reinforcing and wear-resisting member applied on the inner curvedor convex part of the completed lug strap. This leather facing may berelatively short around the curved heel portion only, or may be ofconsiderable length extending as far as the inner ends of the boltslots.

This double reinforcing, each with a tapered structure and eachreinforcement proportional and cooperating with the other, gives anadvantageous cooperation in adding longer life to the double reinforcedlug strap thus constructed, and greatly increases the efficiency,wear-resisting qualities and, hence, decreases the expense of myimproved lug strap made by my present method.

Referring to the drawings illustrating a preferred embodiment of theinvention,

Fig. 1 is a plan View illustrating the method of interrolling thereinforcement in the textile structure;

Fig. 2 is an enlarged cross-sectional View of the same after completionof the interrolling operation;

Figs. 3 and 4 show plan and side views, respectively of the formingdies;

Fig. 5 shows the tapered reinforcing leather facing for the concavesurface;

Fig. 6 shows the application of the reinforce- 5 ment to the saddlebefore the lug strap is applied thereto;

Fig. 7 shows the completion of the U-shaped conformation lof my doublereinforced lug strap;

Figs. 8 and 9 show the completed lug strap 10 structure showingdifferent lengths of the reinforcing facing, and

Fig. 10 is an additional view showing a square heeled lug strap andreinforcement.

As shown in Fig. l, one or more layers of textile 15 material I and 2are applied together with suitable adhesive intermediate the same, andone or more reinforcing layers 3 and 4 are similarly applied to presenta smooth taper in the arm when the combined layers are interrolled. Thelug 20 strap 5 is thereupon subjected to compression while stillplastic, as shown in Figs. 3 and 4, by the edge dies 1, 1 and theconcave dies 8, 8. Thereupon, the lug strap, as thus far completed, issubjected to the usual die-forming operations to conform the same firstinto a flat straight blank, and then into a U-shaped structure, as shownin Figs. 8 and 9.

With the lug strap structure as thus prepared,

I then apply the specially prepared reinforced 30 tapered facing, asshown at l0 in Fig. 6, this facing being tapered at each end at Il andI2. This tapered end structure of the member I0 is preferably formedentirely on the flesh side, as indicated at ifi-I4, leaving the skin andhair 35 surface l5 to aid and assist in taking up the wearresistantfeature desirable, and adding considerably to the toughness and longlife of the entire reinforced lug strap.

In order to add this tapered reinforcement I0 40 to the U-shaped lugstrap, I either fit the reinforcement to the heel of the lug or onto aform or saddle 24, preferably of sufcient length to contain a pluralityof the reinforcements l0. Thereupon, the outer surface is coated withsuit- 45 able cement or adhesive and the lug strap 25 fitted thereoverand the metal shoe 22 applied on each lug strap, springing the free armsof the shoe 22 thereover, and thus supplying a constant compression ortension to hold the lug 50 strap and reinforcement into firm compressiveengagement until the adhesive has set.

As the reinforcement is plastic during the setting of the adhesive, thusgiving the completed blank a final conforming action, applying and iieshside have been transformed into the taperafxing the reinforcement l0firmly on the blank 5, forces the tapered end sections I4 into intimatecontact with the blank 5, forming, in effect, these tapered sections inthe opposite or skin surface, as indicated at 20, 2D, Figs. 6, rI, 8,and 9.

Fig. 10 illustrates a modified form wherein the lug strap 40 after beinginterrolled and while still plastic is formed into'aVU-shaped contourwith the heel portion substantially flat or square,V

and the reinforcing layer 4| is similarly conformed. For this purpose,the saddle 24 wouldV also be square in cross-section at the upper partto permit the leather reinforcement and the lug strap to be held tightlytogether until the adhesive uniting them is set.

In either instance, the original tapers I4 on the i ing surfaces 2l) onthe opposite side of the facing l0, and the double reinforcing at thecrown imparts the added strength, long life, and wearresisting featureswhich are important features of the present invention.

I claim:

The improved process of making lug straps from interroller textilematerial united with adhesive, which consists in forming the'lug strapwith a tapered reinforced structure from the central portion to eachend, producing an extra thickness at said middle portion for the crownpart of the lug strap, molding said blank while the interrolledstructure and adhesive are still plastic into U-shaped form andsimultaneously applying a second tapered reinforcing wear-resistingstrip on the inside of the U-shaped form,

said reinforcing layer having a corresponding and cooperating taper tothat of the crown portion of the strap to whichit is applied, andsubjecting the U-shaped lug vstrap and the tapered reinforcement tocombined pressure until the adhesive has dried, whereby the taperedreinforcing and the tapered lug strap are united, giving a .doublereinforcement at the crown.

WASHINGTON IRVING BULLARD.

CERTIFICATE OF CORRECTION.

Patent No. 2,024,757. December 1v, 1955.

WASHINGTON IRVING BULLARD.

It is hereby Certified that error appears in the printed specificationof the above numbered patent requiring Correction as follows: Page 2,second Column, line 3, in the claim for "interroller" read interrolled;and that the said Letters Patent should be read with this correctiontherein that the same may conform to the record of the oase in thePatent Office.

Signed and sealed this 28th day of January, A. D. 1936.

Leslie Frazer (Seal) Acting Commissioner of Patents.

